Gene that reduces risk of stroke discovered

I tore one of my carotid arteries, so I wonder if I don't have this gene or I was so violent that it overcame any protective effect this had.
There is also this blood clotting gene you may want to know about.

New stroke gene discovery could lead to tailored treatments

And this one;  alteration in a gene called HDAC9 which affects a person's risk of large artery ischemic stroke. 

Genetic variant increases risk of common type stroke

The newest article here;

http://www.allvoices.com/article/100002571
Now new research by a team made up of Royal Holloway researchers together with colleagues drawn from the US and Europe offers some hope of reducing these appalling statistics.
Two pairs of major arteries in the neck, the carotid and the vertebral arteries, together called the cervical arteries, carry blood to the brain. The researchers found that people possessed of a specific variant of a gene, called Phosphatase and Actin Regulator 1 or PHACTR1 for short, are less likely to suffer a cervical artery dissection, a tear in the lining of one of these arteries. Such a tear can lead to compression of adjacent nerves and make a sufferer more likely to develop blood clots that can cause blockage of blood vessels thus restricting blood supply to the brain, so leading to a stroke.
The discovery of these beneficial properties of PHACTR1 could prompt the development of new treatments and prevention strategies for the disease, which is a major cause of stroke in young adults. The PHACTR1 gene variant has also been identified as one that protects against migraines and affects the risk of heart attack.

More at link.